/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Tools/ControlRigPose.h
void BlendWithInitialPoses ( [FControlRigControlPose](API\Plugins\ControlRig\Tools\FControlRigControlPose) & InitialPose, [UControlRig](API\Plugins\ControlRig\UControlRig) * ControlRig, bool bDoKey, bool bdoMirror, float BlendValue )